diff --git a/static/admin/config.yml b/static/admin/config.yml
index b0a4dfc..df9970e 100644
--- a/static/admin/config.yml
+++ b/static/admin/config.yml
@@ -40,6 +40,7 @@ collections:
       - label: 'Theme Settings'
         name: theme settings
         file: 'site/settings.toml'
+        extension: toml
         fields:
           - label: toml file
             name: toml file